CN-121993136-A - Synchronous staged fracturing acidification technology

CN121993136ACN 121993136 ACN121993136 ACN 121993136ACN-121993136-A

Abstract

The invention provides a synchronous staged fracturing and acidizing process which comprises a sliding sleeve arranged at the joint of each section of reservoir and an oil pipe or a sleeve, wherein the opening of the sliding sleeve is controlled to control the flow of a liquid outlet of the sliding sleeve so as to control the liquid inlet amount of each section of reservoir, so that uniform transformation of each section is realized, the sliding sleeve can carry out multistage adjustment on the liquid outlet area of the sliding sleeve, the sliding sleeve can acquire flow data passing through the sliding sleeve in real time or through a flow sensor connected with the sliding sleeve, the flow data can be shared among a plurality of sliding sleeves, the sliding sleeve can carry out remote communication, when ground equipment monitors that the actually measured flow of the liquid outlet of the sliding sleeve is inconsistent with the preset flow of the liquid outlet, the sliding sleeve is in remote communication with ground equipment, the ground equipment sends a control instruction to the sliding sleeve to modify the flow value needed to enter each section of reservoir, and the redistribution of the flow entering of each section of reservoir is realized by adjusting the opening of the sliding sleeve. The method has the advantage that synchronous staged fracturing without layer inversion can be realized.

Inventors

ZENG LINGXIANG
SHI LEI
ZHANG HAOYUE
LI SONGLIN
LI BIN
CHEN XINGYU
LIAO ZIHAN

Assignees

中国石油天然气集团有限公司
中国石油集团川庆钻探工程有限公司

Dates

Publication Date: 20260508
Application Date: 20241108

Claims (10)

1. A synchronous staged fracturing and acidifying process is characterized by comprising a sliding sleeve arranged at the joint of each section of reservoir and an oil pipe or a sleeve, wherein the opening of the sliding sleeve is controlled to control the flow of a liquid outlet of the sliding sleeve so as to control the liquid inlet amount of each section of reservoir, so that uniform transformation of each section is realized, the sliding sleeve can carry out multistage adjustment on the liquid outlet area of the sliding sleeve, the sliding sleeve can acquire flow data passing through the sliding sleeve in real time or through a flow sensor connected with the sliding sleeve, the flow data can be shared among a plurality of sliding sleeves, the sliding sleeve can carry out remote communication, when ground equipment monitors that the actually measured flow of the liquid outlet of the sliding sleeve is inconsistent with the preset flow of the liquid outlet, the sliding sleeve is in remote communication with the ground equipment, the ground equipment sends a control instruction to the sliding sleeve to modify the flow value needed to enter each section of reservoir, and the redistribution of the flow entering of each section of reservoir is realized by adjusting the opening of the sliding sleeve.
2. The synchronized staged fracturing acidizing process of claim 1, wherein one or more sliding sleeves are provided at each of said reservoir sections.
3. The synchronized staged fracturing acidizing process of claim 1, wherein the remote communication includes cabled, untethered, and fiber optic communication.
4. The synchronous staged fracturing and acidizing process of claim 1, wherein the flow sensor is arranged on the upper side of the liquid outlet of the sliding sleeve, the flow sensor can transmit measured flow data to the sliding sleeve, and the sliding sleeve can transmit the data to other sliding sleeves through remote communication.
5. The synchronized staged fracturing and acidizing process of claim 1, wherein the staged progression of the reservoir includes a first stage through an nth stage in a flow direction, the flow into the first stage reservoir being equal to the flow through the sliding sleeve at the first stage, the flow into the nth stage reservoir being equal to the flow through the sliding sleeve at the nth stage minus the flow through the sliding sleeve at the n-1 th stage.
6. The synchronous staged fracturing and acidizing process of claim 5, wherein n is 2-10000.
7. The synchronized staged fracturing, acidizing process of claim 1, wherein the pumping time of each segment of the reservoir is the same and the modification scale of each segment of the reservoir is proportional to the flow rate into each segment of the reservoir.
8. The synchronous staged fracturing and acidizing process of claim 1, wherein the opening adjustment of the sliding sleeve is controlled by closed loop control or open loop control.
9. The synchronous staged fracturing and acidizing process of claim 8, wherein the closed loop control comprises the steps that when the measured flow rate of the liquid outlet of the sliding sleeve is inconsistent with the preset flow rate of the liquid outlet, the ground equipment sends a control command to the sliding sleeve to modify the flow rate value needed to enter each section of the reservoir, the opening degree is automatically adjusted through the sliding sleeve to realize the redistribution of the entering flow rate of each section of the reservoir, and the open loop control comprises the step that when the measured flow rate of the liquid outlet of the sliding sleeve is inconsistent with the preset flow rate of the liquid outlet, the sliding sleeve automatically adjusts the opening degree according to the preset flow rate value through the preset flow rate value and according to the displacement change of the body.
10. The synchronous staged fracturing and acidizing process of claim 1, wherein pressure sensors and temperature sensors are arranged at each section of reservoir, and the auxiliary sliding sleeve adjusts the opening degree.

Description

Synchronous staged fracturing acidification technology Technical Field The invention relates to the technical field of fracturing construction, in particular to a synchronous staged fracturing acidification process. Background The current main flow requirement of fracturing acidification is a staged fracturing acidification technology, so that staged fine transformation of a reservoir can be realized, and the yield is improved. Currently, a plurality of staged fracturing process technologies exist, including ball injection sliding sleeve staged, bridge plug staged, temporary plugging ball/temporary plugging agent staged and the like. The quality of each staged fracturing process technology is evaluated, the layer transfer efficiency is a very important index, and the higher the layer transfer efficiency is, the more the operation efficiency is improved, and the cost is reduced. At the same time, however, the layer transfer time is an unavoidable cost loss, which affects the construction progress to some extent. Based on the method, the synchronous staged fracturing acidification process without layer inversion is of great significance. The Chinese patent with the application number of CN201510078639.6 and the name of staged fracturing method of a horizontal well discloses a staged fracturing method of the horizontal well, which comprises the steps of arranging a fixed seat on the inner wall of a sleeve along the central axis direction of the sleeve according to the stage number of fracturing layers in the sleeve, setting the sleeve at a preset position in the horizontal well, sequentially carrying out the operations of arranging a soluble ball seat at the lower end of a perforation tool string, pumping the perforation tool string and the soluble ball seat into corresponding fracturing layers, controlling the soluble ball seat to form a closed soluble ball seat, enabling the outer diameter of the closed soluble ball seat to be larger than the diameter of the fixed seat, controlling the perforation tool string to be separated from the closed soluble ball seat so as to enable the closed soluble ball seat to be abutted against the fixed seat in the corresponding fracturing layer, controlling the perforation tool string to be at the first preset position in the corresponding fracturing layer, putting the perforation tool string into the corresponding fracturing layer, and throwing the soluble ball seat into the position of the closed soluble through hole to plug the corresponding fracturing layer. But this method is different from the process of the present application. Disclosure of Invention The present invention is directed to solving one or more of the problems of the prior art, including the shortcomings of the prior art. For example, it is an object of the present invention to provide a synchronous staged fracturing acidizing process that does not require a layer inversion. In order to achieve the above purpose, the invention provides a synchronous staged fracturing and acidizing process, which comprises the steps of adopting sliding sleeves arranged at the joints of all sections of reservoirs and oil pipes or sleeves, controlling the flow of the outlet of the sliding sleeves by controlling the opening of the sliding sleeves so as to control the inlet amount of all sections of reservoirs, realizing uniform transformation of all sections, enabling the sliding sleeves to carry out multistage adjustment on the area of the outlet of fluid of the sliding sleeves, enabling the sliding sleeves to acquire flow data passing through the sliding sleeves in real time or through flow sensors connected with the sliding sleeves, enabling the flow data to be shared among a plurality of sliding sleeves, enabling the sliding sleeves to carry out remote communication with ground equipment when ground equipment monitors that the actually measured flow of the outlet of the sliding sleeves is inconsistent with the preset flow of the outlet, enabling the ground equipment to send control instructions to the sliding sleeves, modifying the flow value required to enter all sections of reservoirs, and enabling the flow of each section of reservoirs to be redistributed by adjusting the opening of the sliding sleeves. According to one or more exemplary embodiments of an aspect of the invention, one or more sliding sleeves may be provided at each section of the reservoir. According to one or more exemplary embodiments of an aspect of the invention, the remote communications may include cabled, untethered, and fiber optic communications. According to one or more exemplary embodiments of an aspect of the present invention, the flow sensor may be disposed at an upper side of the fluid outlet of the sliding sleeve, and the flow sensor may be capable of transmitting measured flow data to the sliding sleeve, which in turn transmits the data to other sliding sleeves through remote communication. According to one or more exemplary embodiments o